Schema:
product (product_id, product, dimensions, dpi, pages_per_minute_color, max_page_size, interface)
store (Store_ID, Store_Name, Type, Area_size, Number_of_product_category, Ranking)
district (District_ID, District_name, Headquartered_City, City_Population, City_Area)
store_product (Store_ID, Product_ID)
store_district (Store_ID, District_ID)
Please answer with SQL.